Edward f



(No Model.) 2 Sheets-Sheet 1.

E. E. GOEDUN. E E. EOBBS- STEAM GENERATOR. l

Patented Jan N. PEIEHS. mnu-uxhagnpher, wanungmn. D, C.

.2 Sheetsf-Slieet 2,

4 (NoModel.)

` E. .'E. GORDON u H. HOBBS.

STEAM GENERATOR.

' Patented Jan. l, 1884.

UNrreD Stearns" Param. @trineo EDWARD r. GORDON AND HORATIO Honns, or CONCORD, N. H.

STEAM-GENERATOR.

SPECIFICATION forming part of Letters Patent No, 291,115, dated January 1, 1884 To all whom/7115 may concern:

Beit known that we, EDWARD F. GonDoaT and HORATIO HoBBs, citizens of the United States, residing at Concord, in the .county of Merrimac and State of N ew Hampshire, have jointlyinvented certain new and useful Im-A provements in Steam-Generators; and we do hereby declare that the same are fully described in the following specification `and illustrated in the accompanying drawings.v

This invention is in the nature of an improvement upon that for which Letters Patent No. 271,829 were granted to us January 30, 1883. YIn that invention we arranged a series of hollow castings in a circle around the iirepot, each casting being wedge-formed, with a central aperture through it horizontally, so that when all these sections were united in position the apertures formed one continuous annular horizontal ilue. With our present improvements we retain the annular horizontal iue and fire, but construct the apparatus in a radically different manner from our former invention, omitting the wedge-shaped -castmetal sections, and, in fact, all laterally-connected sections, and employing` either wrought metal alone or partly wrought and partly cast metal. The water-ring below and the steam and water chamber above the fire-pot are con-l nected by water-tubes arranged in two concentric rings, between which the heated products of combustion pass entirely around the re in a horizontal plane toethe funnel, acting on all sides of -such annular iiue meanwhile, to heat the water contained in said tubes, chamber, and water-ring. -External to these tubes is a casing made in sections and capable of being removed from time to time in order to clear out thev iiue, access thereto being had through the spaces between the tubes of the outer ring. Fixed vertical bars occupy the spaces between adjacent tubes of the inner circle. The steam-chamber is surrounded bya sheet-metal jacket inclosing an air-space tending to preserve the steam from condensation. The removable sections are each formed, by preference, of three curved plates of sheet metal united at the edges with spaces between them-the inner space having a filling of asbestus.

Figures Land 2 of the drawings represent, respectively, a vertical central and a horizon- Application iled April 9, 1853. (Xo model.)

tal central section of our improved generator. Fig. 3 is a perspective view thereof, showing one of the casing-sections removed; andv Fig. 4, a detail of means of closing the space between the vertical tubes of the inner series and between the fire-brick and tubes.

In the drawings, A represents an annular steam-chamber, partly iilled with water, which rises to the desired height through vertical tubes G D, extending upward from the waterring B, fed by the inlet-pipe E.

. Fis the fire-brick supported on a ledge of the water-ring. G is the grate, to which fuel :is supplied through a central aperture, H, in the top, closed when in use by a cover, I.

T 'is the ash-pit, provided with a door, T, for draft and for' removal of the ashes; and M, atop casing orjacket,which incloses the steamchamber, the hot air in it tending to prevent condensation of the steam.

J-J represent removable sections of a casing exterior to the vertical pipes D. Each section J, as shown in the drawings, is provided with one or more handles, K, and each has an asbestus filling, protecting it from the action of the heat, and also an airspace with; in it.

The tubes C D are arranged in two conceit tric circles, and expanded into their seats, so as to make perfect joints in the chamber A and ring B. Those of the inner row are prol tected, up ten or twelve inches, by the fire; brick F, at-the top of which blocks S are employed, to prevent coal or ashes passing down between the tubes and brick. In addition, a "series of vertical castings, L, are introduced, alternating with the tubes C, and iilling the curved spaces between them at thevcentral line,where said tubes approach nearest to each other, and outwardly from said line, fitting to said tubes far enough to form with the tubes C a solid wall, as best shown in Figs. 2 and 4:, thus separating the combustion-chamberfrom thefflue,I that each may perform its functions perfectly. The bars L and blocks S are preferably united by a wire projecting from one casting passing through a hole in the other, and bent so as to draw them and hold them to gether in contact with the tubes. These castings L, with the tubes C, form a close .wall around the ire-space, against which the heat impinges, chiefly upon the fully-exposed in Aner halt` of each tube ot theinnerseries above the tire-brick and stopbloelts S, as it does on the under side of the chamber A, so that a large percentage of the heat isabsorbed before it leaves the combustionchamber, tending to rapidly convert the water into steam, and producing an active circulation ofthe water through the several tubes. In front of the `tunnel O one ot' the tubes in each row is omitted, together with two of the castings L, and a detiector provided with a damper, I, is placed obliqnely across the direct way to the funnel. W'henthedamperis closed, the caloriceurrent is detlected from a direct course, as denoted by the arrows, Fig. 2, and caused to traverse the annular tlne Q-that is, to travel horizontally entirely around the tire-pot be tween the two rows of tubes, impingingmeanwhile against' all the tubes ot` each row, and parting with its heat at every touch, so that all the heat is utilized and the structure made most compact and s vnnnetrieal. The vertical tubes C D present their convex surfaces successively to and erosswise ot' the caloric current, which passes horizontally through the annular tlue Q, the entire current passing in contact with every tube of (ach series. (See Fig. 2.) Thus by their transverse position and successive arrangement said tubes absorb far lnore of the heat than they could do if running parallel to said current. Sut'cient space is allowed between the tubes l) of the outer row to give access to the ilue Q, so that it may be freed ot" ashes and soot with abrush or scraper by removing the casingAsect-ions J one after another. (See Fig. 3.) This is ot'I great importance in utilizing the heat, since a coating oi'soot or ashes is an ett'ective sheath to prevent` proper action ot' the heat on the parts A, I3, C, and I).

The top ot'the water-ring B may well be cast in one with the projecting horizontal top of the ash-pit, apertures being formed at intervals tor insertion and expansion ot" the vertical tubes C D, and the bottom ot' this ring, of either cast or wrought iron, riveted tothe top.

The steam-chamber A may be of wrought or ot' cast metal. the upper and lower parts being usually riveted together, the seams lutcd with litharge, as will be clear ,from Fig. 1.

The water-ring and steam-chamber may have flat tops and bottoms and vertical sides, having outward tianges to rivet in place after the tubes C D have been set.

\Ve are aware ot' the patent to Rains, Aui gust 14, 1860, showing a central tire-pot and two complete annular series of vertical waterpipes connecting the water-ring and steamchamber, and having shortened space-pieces between the tubes ofthe inner row, and extend ing in front thereof, so as largely to shield them from the action of the fire. Said patent, however, showed no removable easing l'or cleaning the tlucs, no tire-brick around the tire-pot, no detleetor or damper, and hence no general horizontal current through an annular tlue transverse to the tubes therein. On the contrary, the gaseous products ot' combustion divided into numerous currents, passed over the sh0rtened space-pieces, and between the upper ends ofthcinner tubes, (a small fraction of the whoie current at each pointr) then moved downwardly parallel with and between the tubes ot' the inner and outer row, to pass beneath a eurtain-like cylinder of sheet metal, which cut oft" such currents from further contact with said tubes, and caused the smoke and gases to rise between said sheet-metal cylinder and the outer case to escape at the funnel. XVe make no claim to such an apparatus or arrangement ot'devices; but

To claim as our inveutioul. A. steam-generator having the water ring and steam-chamber united by two concentric series ot' independent water-pipes sur rounding the tire-pot, with an annular space 'between them, forming a horizontal flue, in

combination with a detleetor arranged to deieet the entire calorie-current and cause it to traverse the annular' flue entirely around the fire-pot, substantially as and t'or the purpose set forth.

2. In a steam-generator haring an annular water-ring and steam-chamber united by two concentric series ot" distinct water-pipes, and provided with a detlector adapted to ,direct the entire caloric-current into the annular Aflue, that it may pass horizontally around the tirepot, as described, the vertical bars L, fitting the space between adjacent tubes ot' the inner row, for the purpose set t'orth.

In a steam-generator, an annular waterring and a water and steam space communieating therewith through a double row of vertical pipes, which stand at each side of a horizontal annular tlue and present their convex surfaces transversely to the caloric-current through said flue, in combination with an exterior easing iliade in sections, so as to be removable, substantially as and t'or the purpose set forth.

In testimony whercotl we hereto at'lix our signatures in presence of two witnesses.

EINVARD F. GORDON. `HOB-MPIO HOBBS.

Witnesses:

.Turns A. CrLLnr, XA'rHi.. Il. MARTIN l OO 

